Electronic Properties of the Silver–Silver Chloride Cluster Interface

Glaus, Stephan; Calzaferri, Gion; Hoffmann, Roald

doi:10.1002/1521-3765(20020415)8:8<1785::aid-chem1785>3.0.co;2-x

Cited by 88 publications

(69 citation statements)

References 32 publications

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“…The vibrational energy will be dissipated via anharmonicity into lattice phonons, and the lattice will reach the new equilibrium position Q 2 , i.e., the relaxed excited state. After the mean lifetime has elapsed, the excited electron returns by a vertical emission process to the ground state, and the subsequent lattice relaxation completes the optical cycle [5][6][7][8]. To construct the configuration coordinate diagrams, the ion clusters representing the F A1 :Ga + , F A1 :Au + , F A1 :Ca 2+ , and F A1 :Sr 2+ centers on the (100) surfaces of LiCl were first embedded into the three-dimensional arrays of the point ions described in the "Surface simulation" section.…”

Section: Configuration Coordinate Diagramssupporting

confidence: 78%

“…After the emission process, the assumed saddle-point ion has a 50% chance of hopping to the <110> anion vacancy site opposite its starting location. Therefore, if the F A center system is excited in either one of its absorption bands by polarized light with a direction of propagation parallel to the <100> axis and its electric field vector E parallel to the perpendicular <100> axis, the F A centers excited by this E vector will quickly be reoriented to the <100> direction, at which point the F A centers will no longer be excited, and this reoriented system will become experimentally transparent for the excitation light [5][6][7][8]. However, it has been observed experimentally and theoretically by many workers that no spectral region in the absorption range of the F A band is completely transparent, even after prolonged preferential optical excitation of the F A centers.…”

Section: Orientational Destructionmentioning

confidence: 96%

“…All of the color center lasers realized so far are based on electronic defects. In 1991, Gellerman [5][6][7][8] reviewed some of the optical and laser properties of the most important examples of color center species in alkali halide crystals, and reported that color centers in these crystals can be applied as highgain active materials in tunable solid-state lasers. Using various color center types and host lattices, the combined tuning range of color center lasers covers the near-infrared region from about 0.8 to 4 μm.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Role of cationic size in the optical properties of the LiCl crystal surface: theoretical study

et al. 2011

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The size of the cations (either Ca(2+), Sr(2+), Ga(+), or Au(+)) at the F(A1)-type color centers on the (100) surface of LiCl crystal plays an important role in the optical properties of this surface. In this work, double-well potentials at this surface were investigated using ab initio quantum mechanical methods. Quantum clusters were embedded in simulated Coulomb fields that closely approximate the Madelung fields of the host surface, and the ions that were the nearest neighbors to the F(A1) site were allowed to relax to equilibrium. The calculated Stokes-shifted optical transition bands, optical-optical conversion efficiency, and relaxed excited states of the defect-containing surface, as well as the orientational destruction of the color centers, recording sensitivity, exciton (energy) transfer, and the Glasner-Tompkins empirical relation were all found to be sensitive to the size of the dopant cation.

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Section: Configuration Coordinate Diagramssupporting

confidence: 78%

Section: Orientational Destructionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Role of cationic size in the optical properties of the LiCl crystal surface: theoretical study

et al. 2011

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“…Additional AgCl surface states (SURS), as well as metal induced gap states (MIGS) from Ag/AgCl cluster composites also present in the bandgap region of silver chloride. These different levels are responsible for the self-sensitization of silver chloride [77,78]. They allow excitation of electrons, hence, creation of holes in the valence band by light absorption below bandgap energy.…”

Section: Photocatalytic and Photoelectrochemical Water Splittingmentioning

confidence: 99%

Artificial Photosynthesis

Calzaferri

2009

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One-dimensional channel materials, such as zeolites and mesoporous silicas, are very attractive hosts for the preparation and investigation of hierarchically organized structures, presenting a successive ordering from the molecular up to macroscopic scale. The focus of this article is on artificial photonic antenna systems and on photocatalytically active layers that have been built by incorporating organic dyes, complexes, metal cations and clusters into 1-D nanochannel materials. We show that zeolite L as a host material allows for the design and preparation of a large variety of highly organized hostguest systems. The combination of a tuneable host morphology and the possibility of obtaining highly organized molecular patterns of guests leads to a variety of potential optical and photoelectronic applications. Strongly absorbing systems exhibiting efficient FRET along the c-axis of the zeolite crystals are accessible by sequential inclusion of multiple types of dyes. These new light-harvesting materials offer unique possibilities as building blocks for solarenergy conversion devices. A complementary approach consists in integrating photochemically active substances into zeolite monolayers coated on an electrode and taking advantage of intrazeolite processes for designing a reversible electrode for photocatalytic water oxidation. The photoelectrochemical water splitting capability of systems based on Ag ? /AgCl/Ag n -zeolite photoanodes are discussed.

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“…Microorganisms with resistance to the antimicrobial activity of Ag are exceedingly rare. Such silver has a size of nano-level, the total surface area of the silver become larger in identity volume and antibacterial efficiency is increased (Glaus et al, 2002;Rujitanaroj et al, 2008). PVA is a semi-crystalline hydrophilic polymer with good chemical and thermal stability.…”

Section: Introductionmentioning

confidence: 99%